Patent application number | Description | Published |
20090140813 | RECEIVED SIGNAL GAIN CONTROL METHOD AND RADIO FREQUENCY SIGNAL RECEIVING APPARATUS - A radio signal receiving apparatus receiving a radio signal over a radio channel generates a first amplified signal by amplifying the radio signal with a first gain, and determines the first gain by measuring the strength of the first amplified signal. In addition, the radio signal receiving apparatus generates a down-converted signal by frequency down-converting the first amplified signal, and generates a second amplified signal by amplifying the down-converted signal with a second gain. In addition, the radio signal receiving apparatus determines the second gain by measuring the strength of the second amplified signal. | 06-04-2009 |
20090140821 | APPARATUS AND METHOD FOR COMPENSATING CARRIER FEEDTHROUGH IN QUADRATURE MODULATION SYSTEM - The present invention relates to an apparatus and a method for compensating carrier feedthrough in a quadrature modulation system. In order to suppress the carrier feedthrough, and minimize and compensate the carrier feedthrough, differences of baseband differential input DC voltages in an in-phase as well as a quadrature-phase are simultaneously adjusted to 0 or a certain slight voltage difference by a simple analog circuit. Therefore, it is possible to suppress carrier feedthrough using a simple analog type apparatus for compensating carrier feedthrough, and simply achieve an apparatus for carrier feedthrough using a variety of quadrature modulators. | 06-04-2009 |
20110151775 | REPEATING APPARATUS AND METHOD IN WIRELESS COMMUNICATION SYSTEM - A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station. | 06-23-2011 |
20130162495 | FRONT-END APPARATUS OF WIRELESS TRANSCEIVER USING RF PASSIVE ELEMENTS - Disclosed is a front-end apparatus of an RF transceiver connected with an antenna in a wireless communication system. The front-end apparatus of an RF transceiver using radio-frequency passive elements includes: a plurality of band pass filters configured a transmission signal and a reception signal; a first circulator configured to output a first transmission signal to a second terminal and output a second reception signal input; a second circulator configured to output a second transmission signal input into the first terminal to the second terminal and output a first reception signal input into the second terminal to the third terminal; a passive directional double pole and double throw switch configured to process a route to be changed depending on directions of an input and an output; a first antenna configured to transmit the first transmission signal; and a second antenna configured to transmit the second transmission. | 06-27-2013 |
20130163690 | METHOD FOR TRANSMITTING SIGNAL OF ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING TYPE, AND APPARATUS APPLIED TO THE SAME - The method for transmitting a signal of an orthogonal frequency division multiplexing type according to an exemplary embodiment of the present invention has a configuration allowing a radio unit (RU) to perform a component adding a compression component and a decompression component before/after a serial interface interlocking between a digital unit (DU) and the radio unit (RU) and a component inserting a cyclic prefix (CP) into a signal so as to secure orthogonality of an orthogonal frequency division multiplexing (OFDM) signal, in a structure in which a base station is physically divided into the DU and the RU. | 06-27-2013 |
20150214624 | MICRO BASE STATION ANTENNA - Provided is a micro base station antenna including a substrate etched with first and second micro strip lines, a first inverted F antenna, a second inverted F antenna facing the first inverted F antenna, and an isolator provided between the first inverted F antenna and the second inverted F antenna. According to the present invention, a micro base station antenna that has a wide bandwidth, a high gain, and an enhanced isolation characteristic can be provided. | 07-30-2015 |
20150214634 | DUAL-POLARIZED DIPOLE ANTENNA - Provided is a dual-polarized dipole antenna. The dual-polarized dipole antenna includes a substrate etched as first and second microstrip lines and provided in a cube, first to fourth feeding lines etched as third microstrip lines and disposed in a square type in a vertical direction to the substrate, and first to fourth radiation patches disposed in a square type in the vertical direction to the first to fourth feeding unit, wherein the first to fourth feeding units are respectively disposed on adjacent pairs of the first to fourth radiation patches. According to the present invention, a miniature dual-polarized dipole antenna having a wide bandwidth, high isolation characteristics, and a high gain can be provided. | 07-30-2015 |
20150230258 | TERMINAL FOR D2D COMMUNICATION AND REJECTING INTERFERENCE METHOD THEREOF - A terminal for performing device-to-device (D2D) communication, according to an embodiment of the present invention, includes an antenna configured to transmit/receive an uplink channel signal and a downlink channel signal, a duplexer configured to separate a transmission/reception signal of the antenna into the uplink channel signal and the downlink channel signal, a switch configured to switch the uplink channel signal in a time division duplex (TDD) scheme so as to separate the uplink channel signal into an uplink transmission block and a first reception block, and a second reception block configured to convert the downlink channel signal provided from the duplexer into a baseband. | 08-13-2015 |